More closely, purple shampoos contain purple pigments that neutralize brassy, yellow tones. “Purple shampoo enhances the vibrancy of the hair color, whether natural or color-treated, and ...

Pureology's Strength Cure Blonde Shampoo mixes purple orchid extract with astaxanthin, an antioxidant that boasts a red pigment, to neutralize both brassiness and yellow tones in dyed hair.

One of the best purple shampoos for blonde hair is the Olaplex No.4P Blonde Enhancer Toning Purple Shampoo, which is designed for all hair types, especially those with dry and dull hair that are ...